<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
  <h1>商品更新页面</h1>
  <input type="text" placeholder="id" v-model="p.id" v-show/>
  <input type="text" placeholder="商品标题" v-model="p.title"/>
  <input type="text" placeholder="商品价格" v-model="p.price"/>
  <input type="text" placeholder="商品库存" v-model="p.num"/>
  <input type="button" value="修改" @click="update()">

</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<script>
  let v = new Vue({
    el:"body>div",
    data:{
      /*p:{id:"",title:"",price:"",num:""}*/
      p:{}
    },
    methods:{
      update(){
        axios.post("/update",v.p).then(function (response) {

          location.href = "/list.html";
        })
      }
    },
    created:function (){
      axios.get("/selectById"+location.search).then(function (response){
        v.p = response.data;
      })
    }
  })
</script>
</body>
</html>